Week 4 Part 2 Flashcards
Get gud
What does Annelida mean?
segmented worms
define corp
where food can be stored
define gizzard
ground into smaller pieces
what is a coelomate?
a fluid-filled body cavity that is completely lined by tissue created from the mesoderm
annelida characteristics
-bilateral symmetry
-body cavity: coelomate
-body plan: advanced tube within a tube
-body is divided into segments metamers
-each is separated by septum
-each acts as a hydrostatic skeleton
-each has longitudinal and circular muscles
-each usually has one or more bristles (tough hairs)
called setae
-has a nervous system
-has circulatory system(closed circulatory system)
-several hearts (5 in earthworms)
how do Annelida eat?
eats small organisms and sucks blood
what is the circulatory system
an organ system that permits blood to circulate and transport nutrients
how do Annelida breath?
Diffusion through body wall
What is the internal transport system for Annelida?
5 hearts are used to pump blood through the closed circuit
How do Annelida move
- each has longitudinal and circular muscles
- each usually has one or more sedae
- swimming/crawling
How do Annelida reproduce
most are hermaphroditic
describe excretion in Annelida
excretory tubes remove waste and open to the outside pores
how do Annelida respond to the environment
A brain connected to a pair of venteral nerve cords
how do Annelida fit into this world?
- they are parasites
- part of dood web
- eaten by birds
